TTTK Ultra fashion S740T Bluetooth 4.0 Wireless Sport Music Stereo water-proof Headset Earphone With Microphone Support TF Card Player FM Radio Headphone For IPhone Samsung HTC Note Laptop PC (black) surround neckband design easy to carry, more comfortable than other brands wraparound . Joints flexible, no matter the size of your neck , perfect fit and very light weight and achieve no sense to wear. waterproof design , whether in rainy days , or exercise sweating, nothing to worry about water damage , can be used normally . Easy magnetic earphone storage, Noise reduction & Echo cancellation. Super Express charge , full power just two hours , can bring their own charger Micro USB cable to the computer or to charge through the product . Applicable models : as long as the phone with a Bluetooth-enabled ( including iPhone, Android mobile phone system , etc. ) , tablet PCs , laptops, desktop computers can be applied.